JP4323345B2 - Balanced transmission connector and cable with balanced transmission connector - Google Patents

Description

  The present invention relates to a balanced transmission connector and a cable with a balanced transmission connector, and more particularly to a balanced transmission connector and a balanced transmission connector which are applied to a portion for balanced transmission of data and used for connection between a computer and peripheral devices. It is related with cable with.

  When connecting between a personal computer and a peripheral device, a connector with a cable having connectors at both ends of the cable is used. By connecting the connector at the end of the cable to the personal computer and the peripheral device, Between, data is transmitted.

  There are two types of data transmission: the normal transmission method that uses one wire for each data, and the plus signal to be transmitted using two wires paired for each data and this plus signal. There is a balanced transmission system in which negative signals of the same size and opposite direction are transmitted simultaneously. The balanced transmission system has an advantage that it is less susceptible to noise than a normal transmission system, and is being adopted in many cases.

  FIG. 1 is a plan view of a cable with a balanced transmission connector according to the prior art, and FIG. 2 is a diagram showing the back side of the cable with a balanced transmission connector shown in FIG. In FIGS. 1 and 2, the configuration of the balanced transmission connector 40A located on the left side in the figure is denoted by reference symbol A, and the configuration of the balanced transmission connector 40B positioned on the right side is denoted by reference symbol B. The balanced transmission connector 40A will be mainly described. The arrows shown in FIGS. 1 and 2 indicate the traveling direction of the plus signal or the minus signal.

  As shown in FIGS. 1 and 2, the cable 10 with balanced transmission connector is roughly constituted by balanced transmission connectors 40 </ b> A and 40 </ b> B and a plurality of balanced transmission cables 30. The balanced transmission connector 40A includes a balanced transmission connector main body 11A and a relay board 20A, and the balanced transmission connector 40B includes a balanced transmission connector main body 11B and a relay board 20B.

  A ground pad 21A and a plurality of wiring patterns 22A are formed on the surface of the relay substrate 20A, and a ground pad 24A and a plurality of wiring patterns 25A are formed on the back surface of the relay substrate 20A. The wiring patterns 22A and 25A are a pair of wiring patterns 22A and 25A for transmitting and receiving a pair of signals (a plus signal and a minus signal). By this pair of wiring patterns 22A and 25A, the balanced transmission connector body 11A and the plurality of balanced transmission cables 30 are electrically connected.

  The balanced transmission connector main body 11A includes a ground contact 12A and signal contacts 13A and 15A. The ground contact 12A is formed in a plate shape and is connected to the ground pads 21A and 24A. The signal contact 13A is connected to the wiring pattern 22A, and the signal contact 15A is connected to the wiring pattern 25A.

The balanced transmission cable 30 has a drain line 31, a plus signal line 32, and a minus signal line 33. The drain line 31 is connected to the ground pad 21A, the plus signal line 32 is connected to the wiring pattern 22A, and the minus signal line 33 is connected to the wiring pattern 25A. The balanced transmission connector 40B has the same configuration as the balanced transmission connector 40A. The balanced transmission connector main bodies 11A and 11B having such a configuration are connected to a plurality of balanced transmission cables 30 via the relay board 20A or the relay board 20B so that signals can be transmitted and received ( For example, see Patent Document 1.)
JP 2003-109708 A

  However, the length L1 of the balanced transmission cable 30 may have to be increased depending on the positional relationship between the personal computer that is the connection target and the peripheral device. In such a case, a pair of rectangular signals (plus signal and minus signal) transmitted from one balanced transmission connector (transmission side) are attenuated while passing through the balanced transmission cable 30, and the other There is a problem in that the waveforms of the positive signal and the negative signal received by the balanced transmission connector (receiving side) are lost, and the reliability of the pair of signals is lowered.

  Therefore, the present invention has been made in view of the above points. The signal waveform attenuated by the balanced transmission cable is shaped into the waveform of the signal before attenuation, and the reliability of the signal between the balanced transmission connectors is determined. It is an object of the present invention to provide a balanced transmission connector and a cable with a balanced transmission connector that can improve performance.

  In order to solve the above-mentioned problems, the present invention is characterized by the following measures.

According to one aspect of the present invention, a first receiving wiring pattern that is provided on one surface of a substrate body and receives a plus signal by being connected to a plus signal line of a balanced transmission cable, and the substrate Provided on the other surface of the main body is a receiving wiring pattern pair configured by a second receiving wiring pattern that receives a minus signal by being connected to the minus signal line of the balanced transmission cable. A balanced board having a relay board and a balanced transmission connector body, and transmitting the plus signal or minus signal between the balanced transmission connector body and the balanced transmission cable via the receiving wiring pattern pair. in transmission connector, in the middle of the receiving wiring pattern pair, the equalizer circuit is provided, wherein the first receiving wiring pattern, first receiving wiring pattern And the second reception wiring pattern has a second branch wiring branched from the second reception wiring pattern, and the first branch wiring Includes an inductance element, a resistance element is provided on the second branch wiring, and a through hole that electrically connects the first branch wiring and the second branch wiring to the relay substrate. There is provided a balanced transmission connector characterized in that an electrode is provided .

  According to the above invention, the waveform of the signal attenuated by the balanced transmission cable can be shaped into the waveform of the signal before attenuation. Thereby, the reliability of the signal between the balanced transmission connectors can be improved, and a balanced transmission cable having a longer length than the conventional one can be applied.

  The present invention can shape the waveform of the signal attenuated by the balanced transmission cable into the waveform of the signal before attenuation, thereby improving the reliability of the signal received between the balanced transmission connectors. In addition, it is possible to provide a balanced transmission connector and a cable with a balanced transmission connector that can use a balanced transmission cable having a long length.

  Next, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
A cable 50 with a balanced transmission connector according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a plan view of a cable with a balanced transmission connector according to the first embodiment of the present invention, and FIG. 4 is a view showing the back side of the cable with a balanced transmission connector according to the first embodiment of the present invention. . 3 to 4, the configuration of the balanced transmission connector 45 </ b> A located on the left side in the figure is denoted by reference symbol A, and the configuration of the balanced transmission connector 45 </ b> B positioned on the right side is denoted by symbol B. The following mainly describes the balanced transmission connector 45A. Moreover, the arrow shown in the figure has shown the advancing direction of a plus signal or a minus signal. FIG. 5 is a view of the cable with the balanced transmission connector shown in FIG.

  The cable with balanced transmission connector 50 is roughly composed of balanced transmission connectors 45A and 45B and a plurality (six in this embodiment) of balanced transmission cables 80. The balanced transmission connector 45A includes a balanced transmission connector body 51A and a relay board 60A, and the balanced transmission connector 45B includes a balanced transmission connector body 51B and a relay board 60B.

  First, the balanced transmission cable 80 will be described. The balanced transmission cable 80 includes a drain line 81, a plus signal line 82, and a minus signal line 83. The plus signal line 82 and the minus signal line 83 are for transmitting a pair of signals (a plus signal and a minus signal). The length L2 of the balanced transmission cable 80 is appropriately selected according to the application, and is set to 5 m, for example, longer than usual in this embodiment. The balanced transmission cable 80 is for connecting the balanced transmission connector 45A and the balanced transmission connector 45B. One end of the drain line 81 is connected to the ground pad 62A, and the other end is connected to the ground pad 62B.

  The plus signal line 82 includes one connected to the reception wiring pattern 63A (cable side wiring portion 63-2A) and the transmission wiring pattern 67B, the transmission wiring pattern 67A and the reception wiring pattern 63B (cable side). Some of them are connected to the wiring section 63-2B). The minus signal line 83 is connected to the reception wiring pattern 73A (cable side wiring portion 73-2A) and the transmission wiring pattern 77B, and to the transmission wiring pattern 77A and the reception wiring pattern 73B (cable side wiring). And part 73-2B).

  Next, the balanced transmission connector main body 51A will be described. The balanced transmission connector body 51A includes a ground contact 53A and signal contacts 54A and 56A. A plurality of ground contacts 53A and signal contacts 54A are alternately formed on the front surface side of the balanced transmission connector main body 51A (in this example, six each), and the back surface side of the balanced transmission connector main body 51A. In this embodiment, a plurality of ground contacts 53A and signal contacts 56A are alternately formed (in the present embodiment, six each). The ground contact 53A is formed in a plate shape.

  The ground contact 53A is connected to the ground pads 62A and 72A. Further, the signal contact 54A is connected to the connector side wiring portion 63-1A, and the signal contact 56A is connected to the connector side wiring portion 73-1A. As a result, the balanced transmission connector 51A and the relay board 60A are electrically connected.

The relay board 60A includes a board body 61A, receiving wiring patterns 63A and 73A, transmitting wiring patterns 67A and 77A, ground pads 62A and 72A, insulating parts 64A and 74A, and a CR equalizer circuit 100A. Has been.
The reception wiring pattern 63A that is the first reception wiring pattern and the reception wiring pattern 73A that is the second reception wiring pattern constitute a reception wiring pattern pair. A pair of signals (a plus signal and a minus signal) are received by the reception wiring pattern pair. The CR equalizer circuit 100A includes chip resistors 65A and 75A that are resistance elements and chip capacitors 66A and 76A that are capacitor elements (see FIG. 7).

  A ground pad 62A is formed on the surface of the substrate body 61A, and six insulating portions 64A are formed in the ground pad 62A. Receiving wiring patterns 63A are respectively formed in the upper three insulating portions 64A in FIG. 3, and transmitting wiring patterns 67A are respectively formed in the lower three insulating portions 64A in FIG. Yes.

  A ground pad 72A is formed on the back surface of the substrate body 61A, and six insulating portions 74A are formed in the ground pad 72A. Receiving wiring patterns 73A are respectively formed in the three insulating parts 74A in the lower part of FIG. 4, and transmitting wiring patterns 77A are formed in the three insulating parts 64A in the upper part of FIG. Yes.

  Next, the reception wiring pattern 63A will be described with reference to FIG. FIG. 6 is a view showing the surface of the relay substrate before the chip resistor and the chip capacitor are mounted.

  The receiving wiring pattern 63A includes a connector side wiring portion 63-1A and a cable side wiring portion 63-2A. The connector side wiring portion 63-1A is for connecting the signal contact 54A, and the cable side wiring portion 63-2A is for connecting the plus signal line 82. Between the connector side wiring portion 63-1A and the cable side wiring portion 63-2A, a wiring cutting area 85A is formed, whereby the connector side wiring portion 63-1A and the cable side wiring portion 63-2A are It is set as the structure which is not electrically connected between.

  A connecting portion 87A is provided at the end of the connector side wiring portion 63-1A, and a connecting portion is provided at the end of the cable side wiring portion 63-2A opposite to the end of the connector side wiring portion 63-1A. 89A is provided. The connection portions 87A and 89A (a pair of connection portions) are for mounting the chip resistor 65A and the chip capacitor 66A in parallel. By mounting the chip resistor 65A and the chip capacitor 66A, the connector side wiring The portion 63-1A and the cable side wiring portion 63-2A are electrically connected.

  A chip resistor 65B and a chip capacitor 66B are mounted in parallel on the receiving wiring pattern 63B, and a chip resistor 75B and a chip capacitor 76B are mounted in parallel on the receiving wiring pattern 73B.

  FIG. 7 is a circuit diagram of the CR type equalizer circuit of the present embodiment. FIG. 7 is a circuit diagram illustrating the configuration of the CR equalizer circuit 100A described above.

  Thus, by providing the CR type equalizer circuit 100A in the wiring pattern pair 63A, 73A, the shape of the pair of signals attenuated while passing through the balanced transmission cable 80 is the shape of the pair of signals before being attenuated. Can be shaped. Accordingly, a pair of signals are accurately transmitted between the balanced transmission connector 45A and the balanced transmission connector 45B using the balanced transmission cable 80 having a long length L2, for example, a length of 5 m to 10 m. be able to.

  The width W2 of the connecting portion 87A is configured to be wider than the width W1 of the other connector side wiring portion 63-1A excluding the connecting portion 87A, and the width W3 of the connecting portion 89A excludes the connecting portion 89A. The other connector side wiring part 63-2A is configured to be wider than the width W4. In this way, by configuring the connection portions 87A and 89A with the wide widths W2 and W3, the chip resistor 65A and the chip capacitor 66A can be easily mounted on the connection portions 87A and 89A.

  Note that a CR type equalizer circuit composed of resistance elements 65B and 75B and capacitor elements 66B and 76B is also mounted on the pair of reception wiring patterns 63B and 73B. Further, the constants of the resistance elements 65A, 65B, 75A, and 75B and the constants of the capacitor elements 66A, 66B, 76A, and 76B are appropriately selected according to the length of the balanced transmission cable 80. Generally, when the length L2 of the balanced transmission cable 80 is long, resistance elements 65A, 65B, 75A, and 75B having large constants are used, and capacitor elements 66A, 66B, 76A, and 76B have small constants. It is good to use.

  As described above, a pair of signals received by the pair of reception wiring patterns via the balanced transmission cable 80 is obtained by providing a CR type equalizer circuit for the pair of reception wiring patterns. Can be shaped into the waveform of a pair of signals before attenuation, and the reliability of the pair of signals received between the balanced transmission connector 45A and the balanced transmission connector 45B can be improved.

  In this embodiment, the cable 50 with a balanced transmission connector for transmitting signals in both directions has been described as an example. However, this embodiment has a balanced transmission connector for transmitting signals in one direction. The present invention can also be applied to a cable, and the same effect can be obtained.

(Second embodiment)
A cable 120 with a balanced transmission connector according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a plan view of a cable with a balanced transmission connector according to a second embodiment of the present invention, and FIG. 9 is a view showing the back side of the cable with a balanced transmission connector according to the second embodiment. In FIG. 8, the same components as those in FIG. In FIG. 9, the same components as those in FIG. The second embodiment is a modification of the first embodiment, and in the present embodiment, parts different from the first embodiment will be mainly described.

  The cable with balanced transmission connector 120 is roughly composed of balanced transmission connectors 150A and 150B and a plurality (six in this embodiment) of balanced transmission cables 80. The balanced transmission connector 150A includes a balanced transmission connector body 51A and a relay board 125A, and the balanced transmission connector 150B includes a balanced transmission connector body 51B and a relay board 125B.

  In general, the relay board 125A includes a board body 61A, reception wiring patterns 130A and 140A, transmission wiring patterns 67A and 77A, ground pads 62A and 72A, insulating portions 64A and 74A, and an LCR equalizer circuit 126A. It is comprised by. The reception wiring pattern 130A and the reception wiring pattern 140A constitute a pair of reception wiring patterns 130A and 140A. The LCR equalizer circuit 126A is provided in the pair of reception wiring patterns 130A and 140A. The LCR equalizer circuit 126A includes chip resistors 65A, 75A, and 137A, chip capacitors 66A and 76A, and a chip inductance 127A.

  Next, with reference to FIG. 10, the receiving wiring pattern 130A provided on the front surface side of the substrate body 61A will be described. FIG. 10 is a view showing the surface of the relay board before various chips are mounted.

  The reception wiring pattern 130A is a first reception wiring pattern. The reception wiring pattern 130A includes a cable side wiring portion 63-2A, a connector side wiring portion 63-1A, and a first branch wiring 131A. The chip resistor 65A and the chip capacitor 66A are mounted so as to electrically connect the cable side wiring portion 63-2A and the connector side wiring portion 63-1A.

  The first branch wiring 131A includes a branch wiring part 142-1A and an electrode connection wiring part 142-2A. A first wiring cutting area 170A is formed between the branch wiring section 142-1A and the electrode connecting wiring section 142-2A. The branch wiring portion 142-1A is a wire branched from the connector side wiring portion 63-1A, and a connection portion 145 is provided at an end of the branch wiring portion 142-1A.

  The electrode connecting wiring part 142-2A is a wiring for connecting to the through-hole electrode 128A, and a connecting part 146 is provided at the end of the side not connected to the through-hole electrode 128A. The connecting portions 145 and 146 are for mounting the chip inductance 127A. As shown in FIG. 8, the chip inductance 127 </ b> A is mounted so as to electrically connect the connection portion 145 and the connection portion 146.

  Next, with reference to FIG. 11, the receiving wiring pattern 140A provided on the back surface side of the substrate body 61A will be described. FIG. 11 is a view showing the back surface of the relay board before various chips are mounted.

  The reception wiring pattern 140A is a second reception wiring pattern. The reception wiring pattern 140A includes a cable side wiring part 73-2A, a connector side wiring part 73-1A, and a second branch wiring 141A. The chip resistor 75A and the chip capacitor 76A are mounted so as to electrically connect the cable side wiring portion 73-2A and the connector side wiring portion 73-1A.

  The second branch wiring 141A includes a branch wiring section 152-1A and an electrode connection wiring section 152-2A. A second wiring cutting region 171A is formed between the branch wiring portion 152-1A and the electrode connecting wiring portion 152-2A. The branch wiring portion 152-1A is a wire branched from the connector side wiring portion 73-1A, and a connection portion 148 is provided at an end of the branch wiring portion 152-1A.

  The electrode connecting wiring portion 152-2A is a wiring for connecting to the through-hole electrode 128A, and a connecting portion 149 is provided at an end portion on the side not connected to the through-hole electrode 128A. The connecting portions 148 and 149 are for mounting the chip resistor 137A. As shown in FIG. 9, the chip resistor 137 </ b> A is mounted so as to electrically connect the connection portion 145 and the connection portion 146.

  12 is a cross-sectional view of the relay board shown in FIG. 10 taken along the line EE. As shown in FIG. 12, a through-hole electrode 128A that penetrates the relay substrate 61A is formed inside the relay substrate 61A. The through-hole electrode 128A is for electrically connecting the electrode connecting wiring portion 152-2A and the electrode connecting wiring portion 142-2A.

  FIG. 13 is a circuit diagram of the LCR equalizer circuit of this embodiment. FIG. 13 is a circuit diagram showing the LCR equalizer circuit 126A having the above-described configuration.

  As described above, the LCR equalizer circuit 126A is provided in the pair of reception wiring patterns 130A and 140A, and the reception wiring pattern 130A and the reception wiring pattern 140A are electrically connected by the through-hole electrode 128A. The waveform of the pair of signals that have passed through the balanced transmission cable 80 and attenuated can be accurately shaped into the waveform of the signal before attenuation.

  Note that an LCR equalizer circuit composed of chip resistors 65B, 75B, 137B, capacitors 66B, 76B, and a chip inductance 127B is also mounted on the pair of reception wiring patterns 130B, 140B provided on the relay substrate 61B. The reception wiring pattern 130B and the reception wiring pattern 140B are electrically connected by a through-hole electrode 128B.

  With the configuration as described above, the pair of reception wiring patterns accurately shape the pair of signals received via the balanced transmission cable 80 into the waveforms of the pair of signals before attenuation, The reliability of signals received between the balanced transmission connector 150A and the balanced transmission connector 150B can be further improved.

  In the present embodiment, the cable 120 with a balanced transmission connector for transmitting signals in both directions has been described as an example. However, the present embodiment has a balanced transmission connector for transmitting signals in one direction. The present invention can also be applied to a cable, and the same effect can be obtained.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible. When the receiving wiring pattern is formed inside the substrate bodies 61A and 61B, a pair of through-hole electrodes connected to the receiving wiring pattern is formed up to the front or back surface of the substrate bodies 61A and 61B. The LCR equalizer circuit can be provided so as to connect the pair of through-hole electrodes, and the same effect as in the above embodiment can be obtained.

  The present invention relates to a balanced transmission that can improve the reliability of a signal received between balanced transmission connectors by shaping the waveform of a signal attenuated by a balanced transmission cable into a waveform of the signal before the attenuation. Applicable to connectors and cables with balanced transmission connectors.

It is a top view of the cable with the connector for balanced transmission which is a prior art. It is the figure which showed the back surface side of the cable with the connector for balanced transmission shown in FIG. It is a top view of the cable with the connector for balanced transmission by 1st Example of this invention. It is the figure which showed the back side of the cable with the connector for balanced transmission by 1st Example. It is the figure which looked at the cable with the connector for balanced transmission shown in FIG. It is the figure which showed the surface of the relay board | substrate before chip resistance and a chip capacitor are mounted. It is a circuit diagram of a CR type equalizer circuit of the present embodiment. It is a top view of the cable with the connector for balanced transmission by 2nd Example of this invention. It is the figure which showed the back side of the cable with the connector for balanced transmission by 2nd Example. It is the figure which showed the surface of the relay board | substrate before various chips | tips are mounted. It is the figure which showed the back surface of the relay substrate before various chips | tips are mounted. It is sectional drawing of the EE line direction of the relay board | substrate shown in FIG. It is a circuit diagram of the LCR type equalizer circuit of a present Example.

Explanation of symbols

10, 50, 120 Cable with connector for balanced transmission 11A, 11B, 51A, 51B Connector body for balanced transmission 12A, 12B, 53A, 53B Ground contact 13A, 13B, 15A, 15B, 54A, 54B, 56A, 56B Signal contact 20A, 20B, 60A, 60B, 125A, 125B Relay board 21A, 21B, 24A, 24B, 62A, 62B, 72A, 72B Ground pad 22A, 22B, 25A, 25B Wiring pattern 30, 80 Balance transmission cable 31, 81 Drain Line 32, 82 Positive signal line 33, 83 Negative signal line 40A, 40B, 45A, 45B, 150A, 150B Balanced transmission connector 61A, 61B Substrate body 63A, 63B, 73A, 73B, 130A, 130B, 140 , 140B Reception wiring pattern 63-1A, 63-1B, 73-1A, 73-1B Connector side wiring part 63-2A, 63-2B, 73-2A, 73-2B Cable side wiring part 64A, 64B, 74A, 74B Insulating part 65A, 65B, 75A, 75B, 137A, 137B Chip resistor 66A, 66B, 76A, 76B Chip capacitor 67A, 67B, 77A, 77B Transmission wiring pattern 85A Wiring cutting area 87A, 89A, 145, 146, 148, 149 Connection unit 100A, 110A CR type equalizer circuit 126A LCR type equalizer circuit 127A, 127B Chip inductance 128A, 128B Through-hole electrode 131A, 131B First branch wiring 141A, 141B Second branch wiring 142-1A, 142-1B, 1 52-1A, 152-1B Branch wiring section 142-2A, 142-2B, 152-2A, 152-2B Electrode connection wiring section 170A First wiring cutting area 171A Second wiring cutting area C1, C2, D1, D2 area L1, L2 length W1-W4 width

Claims (6)

Provided on one surface of the substrate body, and provided on the other surface of the substrate body, a first receiving wiring pattern for receiving a plus signal by being connected to a plus signal line of a balanced transmission cable, A relay board including a reception wiring pattern pair configured by a second reception wiring pattern that receives a negative signal by being connected to the negative signal line of the balanced transmission cable;
A connector body for balanced transmission,
In the balanced transmission connector for transmitting the plus signal or the minus signal between the balanced transmission connector body and the balanced transmission cable via the reception wiring pattern pair,
An equalizer circuit is provided in the middle of the reception wiring pattern pair ,
The first receiving wiring pattern has a first branch wiring branched from the first receiving wiring pattern,
The second receiving wiring pattern has a second branch wiring branched from the second receiving wiring pattern;
The first branch wiring is provided with an inductance element,
A resistance element is provided in the second branch wiring,
A connector for balanced transmission, wherein the relay substrate is provided with a through-hole electrode for electrically connecting the first branch wiring and the second branch wiring. Each of the first and second receiving wiring patterns is provided with a wiring cutting area,
2. The balanced transmission connector according to claim 1, wherein the equalizer circuit is provided in the wiring cutting region so as to electrically connect the first and second receiving wiring patterns. A pair of end portions are formed in the wiring cutting regions of the first and second receiving wiring patterns,
A pair of connection portions are provided at the pair of end portions,
The width of the pair of connection portions in the direction orthogonal to the traveling direction of the plus signal or minus signal is configured to be wider than the width of the first and second receiving wiring patterns. The balanced transmission connector according to claim 2 . The equalizer circuit has a resistance element and a capacitor element,
4. The balanced transmission connector according to claim 1, wherein the resistance element and the capacitor element are provided in the pair of connection portions so as to be parallel to each other. 5. The first branch wiring has a first wiring cutting region,
The second branch wiring has a second wiring cutting region,
The inductance element is provided in the first wiring cutting region to electrically connect the first branch wiring;
The resistive element is balanced transmission connector according to any one of claims 1 to 4, characterized in that provided on the second wiring cutting area so as to electrically connect the second branch wirings . A balanced transmission cable;
A cable with a balanced transmission connector, wherein the balanced transmission connector according to any one of claims 1 to 5 is provided at both ends of the balanced transmission cable.

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